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Finding the Fourth Proportional to 884.80, 1,327.20 and 447.40

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Solution

The fourth proportional to 884.80, 1,327.20 and 447.40 is: 671.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    884.80 : 1,327.20 = 447.40 : x
  2. Step 2: Convert to fraction form
    884.80/1,327.20 = 447.40/x
  3. Step 3: Cross multiply
    884.80x = 1,327.20 × 447.40
  4. Step 4: Simplify right side
    884.80x = 593,789.28
  5. Step 5: Solve for x
    x = 593,789.28/884.80
  6. Step 6: Final answer
    x = 671.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.